Q1) Find out value of α as shown in figure below, if degrees of freedom were seven and nine.
A) 0.1
B) 0.01
C) 0.025
D) 0.05
Q2) A pharmaceutical company is testing effectiveness of new drug for lowering cholesterol. As part of this trial, they want to find out whether there is a difference between effectiveness for women and for men. At = .05, what is the test value?
|
|
Women
|
Men
|
|
Sample size
|
40
|
70
|
|
Mean effect
|
7
|
6.75
|
|
Sample variance
|
2.5
|
4.5
|
A) 0.70
B) 1.97
C) 0.36
D) 1.42
Q3) In testing equality of two means below, find out the test statistic? (Use the unequal variances formula)
|
|
Sample 1
|
Sample 2
|
|
Sample size
|
9
|
12
|
|
Sample mean
|
80
|
115
|
|
Sample variance
|
550
|
100
|
A) -4.20
B) -2.31
C) -0.18
D) -0.50